WO2017012744A1 - Procédé et dispositif de fonctionnement d'un capteur de vitesse de rotation, système de capteurs de vitesse de rotation - Google Patents

Procédé et dispositif de fonctionnement d'un capteur de vitesse de rotation, système de capteurs de vitesse de rotation Download PDF

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Publication number
WO2017012744A1
WO2017012744A1 PCT/EP2016/061697 EP2016061697W WO2017012744A1 WO 2017012744 A1 WO2017012744 A1 WO 2017012744A1 EP 2016061697 W EP2016061697 W EP 2016061697W WO 2017012744 A1 WO2017012744 A1 WO 2017012744A1
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WO
WIPO (PCT)
Prior art keywords
speed
signal
information signal
sensor elements
speed information
Prior art date
Application number
PCT/EP2016/061697
Other languages
German (de)
English (en)
Inventor
Bernd Tepass
Wolfgang Welsch
Oliver Hahn
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to BR112018000238-0A priority Critical patent/BR112018000238A2/pt
Priority to KR1020187001822A priority patent/KR102621219B1/ko
Priority to EP16724892.1A priority patent/EP3325979B1/fr
Priority to US15/745,501 priority patent/US10794927B2/en
Priority to JP2018502747A priority patent/JP6609033B2/ja
Priority to CN201680042273.XA priority patent/CN107850618B/zh
Publication of WO2017012744A1 publication Critical patent/WO2017012744A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/489—Digital circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2451—Incremental encoders
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
    • G01P3/4805—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general by using circuits for the electrical integration of the generated pulses

Definitions

  • the invention relates to a method for operating a speed sensor, in particular as a component of a motor vehicle having a signal transmitter ring with a plurality of distributed over its circumference with alternating orientation arranged magnetic elements and a signal receiver with at least two sensor elements for detecting the magnetic fields of the magnetic elements, wherein the sensor elements uniformly spaced are arranged to each other, and wherein depending on the detected by the sensor elements magnetic field strengths generated information bits and as
  • the invention relates to a corresponding device for operating a speed sensor and a speed sensor device with the described speed sensor and with the above-mentioned device.
  • the knowledge of current speeds is important for safety-relevant systems and for the correct control of different drive systems.
  • the speed is detected by means of a speed sensor.
  • the wheel speed information is determined in particular by the scanning of a magnetic encoder or a ferromagnetic gear, which is distributed as a signal generator ring with several evenly distributed over its circumference
  • Magnetic elements in particular permanent magnets, is formed, the one have alternating magnetic orientation.
  • the magnetic fields of the magnetic elements are detected during a rotation of the signal generator ring, wherein a function of the strength of the respectively detected magnetic field
  • Output current is provided by means of a current interface of a control device for further use as a speed information signal.
  • the speed information is provided with each magnetic field direction change.
  • the resolution of the speed signal thus depends on
  • Speed information signal is added and provided with a further information, the further information being increased
  • At least one additional speed information signal is generated as a function of a determined speed, in particular of the signal transmitter ring, and added to the speed information signal.
  • the additional speed information signal is preferably provided as an additional information bit, in particular in the speed information signal. In particular, it is provided that the additional speed information signal is generated only until the determined speed a predetermined
  • Signaling ring is associated with an electric drive machine of the motor vehicle, the rotational speed of the drive motor and a travel of the motor vehicle can be determined very accurately at slow speeds of the motor vehicle.
  • the method is carried out in particular when a parking operation, in particular an automated parking operation, is carried out. In the low
  • Speed range of, for example, 0 to 50 km / h is made by the method a multiplied interface frequency, while in the higher
  • Speed range for example, from 50 km / h, ie in particular above the limit speed, a basic interface frequency is present, which provides a reliable result even with further increasing speed / speed.
  • Hiding the additional information can be done by eliminating the entire information packet "Speed pulse including bit protocol" or by successive omission of the data bits / information bits and finally the speed pulse.
  • the additional rotational speed information signal is generated as a function of a detected magnetic field strength.
  • the additional speed information signal is generated with a current intensity which differs from the current intensity of the
  • Speed information signal can be easily distinguished between information bits and additional additional information bits.
  • an AK protocol is used to generate the speed information signal.
  • a typical interface current, generated by the speed sensor, of, for example, k 7 mA then results in the
  • Interface current of IM 14 mA gives a mean current for bit
  • the speed sensor or the signal receiver has three sensor elements, wherein output signals of the sensor elements are linked to increase the resolution of the speed information signal. It can depend on the selected
  • Linking the resolution of the speed signal can be increased to different levels.
  • the selected link or links provide further information
  • the device according to the invention with the features of claim 8 is characterized in that the control unit is specially adapted to carry out the method according to the invention. This results in the already mentioned advantages. Other features and advantages will be apparent from the foregoing and from the claims.
  • the speed sensor device according to the invention with the features of claim 9 is characterized by the device according to the invention. This results in the already mentioned advantages for the
  • Has sensor elements which are designed in particular as a bridge circuit. In particular, by linking the signal outputs of
  • Figure 1 shows a method for generating an additional
  • FIG. 2 shows a simplified representation of a rotational speed sensor device
  • FIG. 3 shows a known method
  • Figure 4 shows a development of the method.
  • the rotational speed of a wheel or an engine is determined by means of a speed sensor without contact. It is known to associate the rotating element with an encoder in the form of a signal generator ring, which arranged a plurality of evenly distributed over its circumference
  • FIG. 1 shows an exemplary embodiment of a rotational speed sensor device comprising two sensor elements SR, SL, a right sensor element (R) and a left sensor element (L). Due to the distance between the sensor elements to each other and the adjacent magnetic elements to each other, the magnetic field strengths shown arise.
  • a speed information signal is provided by means of a current interface as a function of the detected magnetic field strengths.
  • a typical interface stream provided by the RPM sensor device is mA results in a "low" in the control unit
  • the speed information takes place with each change from a north pole to an adjacent south pole S of the signal generator ring or from the south pole S to the north pole N, ie when changing the orientation of the magnetic field.
  • the resolution of a speed and path information is limited by the number of magnetic elements of the signal generator ring.
  • the resolution of the speed information signal is increased, so that a more accurate information about a covered distance is made available even at slow speeds, so that the method can be used for example in an automated parking operation of a motor vehicle or in a so-called remote parking.
  • Information bits 0-8 can be used as additional information bits.
  • three sensor elements are provided according to the present exemplary embodiment, with a further sensor element SM being present between the two with reference to the previously described two sensor elements SR and SL
  • Sensor elements is.
  • the three sensor elements are in particular spatially separated and evenly spaced from each other.
  • the sensor elements can be designed as Hall, GM R, AM R or TM R sensors.
  • the two outer sensor elements are arranged at a defined distance from the central sensor element SM. If further sensor elements are added, these are likewise to be arranged equidistant from the already existing sensor elements.
  • the three sensor elements are formed according to the present embodiment in the form of half bridges, as shown in Figure 2.
  • the outputs of each bridge become A / D analog-to-digital converters
  • the power interface SS includes a
  • Diagnostic module D a zero crossing detection device N and a direction of rotation recognition DR.
  • a speed function signal in the form of a protocol P is provided.
  • the evaluation of the individual or the combination of the sensor elements Si_, SM and SR are placed on the current interface SS in such a way that not only the zero crossing in the
  • Speed information signal is mapped, but also the result of the individual or the combination of the sensor elements. This results in a doubling, tripling or quadrupling of the original signal frequency and thus the signal resolution or the
  • the application of the increased signal resolution is indicated in particular via an AK protocol bit.
  • the protocol transition as it is usually defined in the AK protocol, is not influenced at high speeds. Additionally or alternatively, advantageously several switching thresholds are either fixed or in
  • the speed sensor device When each of the switching thresholds is exceeded, the speed sensor device then generates a wide output pulse, by which the resolution of the
  • the switching thresholds can be programmed or adaptive.
  • the rotational speed sensor device it is also conceivable to carry out the rotational speed sensor device as an angle sensor which measures the current angle of each pole pair of the magnetic elements and at certain points, for example every 30 ° (per pole pair 6
  • Flanks / pulses instead of 2) a flank change or pulse outputs.
  • different sensor technologies in the rotational speed sensor device, such as, for example, Hall sensors and xMR sensors.
  • Hall sensors and xMR sensors are sensitive to different components of the magnetic field respectively provided by the magnetic elements and these components have a phase offset to each other. This makes it possible that in each case in the magnetic zero crossing and thus at the steepest point of the signal is switched, which allows a good jitter and a doubling of the path resolution.
  • Magnetic field direction the reaching of a maximum or minimum detected and output as an output signal.
  • the signal waveform of the sensor elements Si_, SM and SR is linked such that results in an additional output signal. Further signal connections and their evaluation enable the definition of the direction of rotation.
  • Sensor element Si_, SM, SR detected zero crossing is given as an output signal to the output.
  • a variable is set with which a speed threshold can be specified.
  • Control unit or component are set. When setting a speed threshold not equal to 0, whenever the
  • Speed is less than or equal to the speed threshold, the method described above for increasing the resolution of
  • the additional information bit is no longer added to the speed information signal. It is particularly preferred that a hysteresis for the
  • Speed threshold is applied to avoid oscillating between increased resolution and normal operation.
  • an AK protocol can no longer guarantee secure information transmission. This is due to the signal width of the protocol bits of typically 50 is. If a "high” and a "low” are used for a signal, the result is a period of 100 is. This corresponds to an electrical frequency of 10 kHz at the AK interface and a magnetic frequency of 5 kHz.
  • the method provides an additional information bit through the current interface SS of the
  • Speed sensor device provided and transmitted, for example, to a control unit, without the previously used AK protocol is affected.
  • the additional information bit leads to an increased path resolution (tick), derived from the course of the magnetic flux density and the specific arrangement of the sensor elements Si_, SM, SR (number and spatial position) in FIG.
  • FIG. 4 shows by way of example a product produced by the presented method
  • Additional speed information signal Z which results in an interface current of lz 21 mA.
  • one of the information bits can be used as additional information bit. This is of course only exemplary, other current values for the additional information bit can be selected. As already mentioned, at low speed respectively
  • the additional speed information signal or the " further information pulse " is incorporated into the signal information as shown, for example, in Figure 3, at physically every 60 ° ringing angle
  • the speed information pulse IH zero crossing pulse
  • the sum of the bits (14 mA) at typical interface frequency represents a pulse packet with a fixed time grid.
  • the additional speed information signal is the Encoder angle assigned and added to a corresponding position in the AK protocol with appropriate amplitude (in this case 21 mA) until the speed threshold is exceeded.
  • the frequency of the signal at the current interface SS increases. As the interface frequency increases, so does the frequency
  • Interface information hidden for this purpose, preferably a
  • Frequency hysteresis is provided to avoid confused switching on and off of the additional speed information signal. In principle, for higher frequencies it is also possible to "move in” the signal with additional information bits into the bit packet.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)

Abstract

L'invention concerne un procédé de fonctionnement d'un capteur de vitesse de rotation, en particulier d'un véhicule automobile, avec un anneau transducteur, qui comprend plusieurs éléments magnétiques disposés selon une répartition régulière sur son pourtour avec une orientation magnétique alternée, et avec un récepteur de signaux qui comprend au moins deux éléments capteurs (SL,SM,SR) pour détecter les champs magnétiques des aimants, les éléments capteurs (SL,SM,SR) étant disposés écartés régulièrement les uns des autres et des bis d'informations sont générés en fonction des intensités de champ magnétique détectées par les éléments capteurs (SL,SM,SR) et sont mis à disposition en tant que signal normal d'informations de vitesse de rotation. Selon l'invention, en cas d'une vitesse de rotation faible, au moins un signal d'informations de vitesse de rotation supplémentaire est généré et est ajouté au signal d'informations de vitesse de rotation. Ce signal supplémentaire est composé d'impulsions de vitesse de rotation supplémentaires qui sont insérées entre respectivement deux impulsions de signal normales. On dispose ainsi de plusieurs impulsions de vitesse de rotation par période de l'anneau transducteur de sorte qu'une résolution plus élevée est possible pour la détermination de la vitesse.
PCT/EP2016/061697 2015-07-20 2016-05-24 Procédé et dispositif de fonctionnement d'un capteur de vitesse de rotation, système de capteurs de vitesse de rotation WO2017012744A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR112018000238-0A BR112018000238A2 (pt) 2015-07-20 2016-05-24 processo e dispositivo para operação de sensor do número de rotações, instalação do sensor do número de rotações
KR1020187001822A KR102621219B1 (ko) 2015-07-20 2016-05-24 회전 속도 센서의 작동 방법 및 장치, 회전 속도 센서 장치
EP16724892.1A EP3325979B1 (fr) 2015-07-20 2016-05-24 Procédé et dispositif de fonctionnement d'un capteur de vitesse de rotation, système de capteurs de vitesse de rotation
US15/745,501 US10794927B2 (en) 2015-07-20 2016-05-24 Method and device for operating a rotational speed sensor, rotational speed sensor device
JP2018502747A JP6609033B2 (ja) 2015-07-20 2016-05-24 回転数センサを動作させるための方法及び装置並びに回転数センサ装置
CN201680042273.XA CN107850618B (zh) 2015-07-20 2016-05-24 用于运行转速传感器的方法和装置、转速传感器设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015213572.1A DE102015213572A1 (de) 2015-07-20 2015-07-20 Verfahren und Vorrichtung zum Betreiben eines Drehzahlsensors, Drehzahlsensoreinrichtung
DE102015213572.1 2015-07-20

Publications (1)

Publication Number Publication Date
WO2017012744A1 true WO2017012744A1 (fr) 2017-01-26

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PCT/EP2016/061697 WO2017012744A1 (fr) 2015-07-20 2016-05-24 Procédé et dispositif de fonctionnement d'un capteur de vitesse de rotation, système de capteurs de vitesse de rotation

Country Status (8)

Country Link
US (1) US10794927B2 (fr)
EP (1) EP3325979B1 (fr)
JP (1) JP6609033B2 (fr)
KR (1) KR102621219B1 (fr)
CN (1) CN107850618B (fr)
BR (1) BR112018000238A2 (fr)
DE (1) DE102015213572A1 (fr)
WO (1) WO2017012744A1 (fr)

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DE102018215938A1 (de) 2018-09-19 2020-03-19 Infineon Technologies Ag Hochauflösungsmodus für einen Magnetfeldsensor
KR102073771B1 (ko) * 2018-11-14 2020-02-05 재단법인 경북아이티융합 산업기술원 차량 조향을 위한 토크 신호의 잡음 제거 장치 및 그 방법
FR3093177B1 (fr) * 2019-02-26 2021-01-22 Continental Automotive Capteur magnétique de vitesse à résolution augmentée
CN115023617A (zh) * 2020-01-29 2022-09-06 大陆汽车科技有限公司 高分辨率pwm车轮速度传感器协议
DE102020205965A1 (de) 2020-05-12 2021-11-18 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Betreiben eines Drehzahlsensors, Vorrichtung, Drehzahlsensoreinrichtung
DE102020208763A1 (de) 2020-07-14 2022-01-20 Robert Bosch Gesellschaft mit beschränkter Haftung Drehzahlsensoranordnung für ein Fahrzeug
CN112033451A (zh) * 2020-08-03 2020-12-04 珠海格力电器股份有限公司 一种编码器的测量装置、方法和编码器
DE102021212324A1 (de) 2021-11-02 2023-05-04 Continental Automotive Technologies GmbH Verfahren zur Auswertung von Radsensorsignalen, Anordnung dazu und Bremssystem umfassend die Anordnung
DE102022113709A1 (de) 2022-05-31 2023-11-30 Zf Cv Systems Europe Bv Drehmesseinrichtung, Drehmesssystem, Fahrzeug und Verfahren zur Drehmessung

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US10907994B2 (en) 2017-04-04 2021-02-02 Infineon Technologies Ag Sensor devices, systems and methods
DE102018121998A1 (de) * 2018-09-10 2020-03-12 Infineon Technologies Ag Vorrichtungen und Verfahren zum Senden und Empfangen von Drehzahlinformationen
KR20210075045A (ko) * 2018-09-10 2021-06-22 인피니온 테크놀로지스 아게 회전 속도 정보를 전송 및 수신하기 위한 장치들 및 방법들
US11262418B2 (en) 2018-09-10 2022-03-01 Infineon Technologies Ag Apparatuses and methods for sending and receiving rotation speed information
KR102586469B1 (ko) * 2018-09-10 2023-10-11 인피니온 테크놀로지스 아게 회전 속도 정보를 전송 및 수신하기 위한 장치들 및 방법들

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DE102015213572A1 (de) 2017-01-26
KR102621219B1 (ko) 2024-01-08
CN107850618A (zh) 2018-03-27
KR20180031682A (ko) 2018-03-28
US20180210004A1 (en) 2018-07-26
BR112018000238A2 (pt) 2018-09-04
EP3325979A1 (fr) 2018-05-30
CN107850618B (zh) 2021-03-19
US10794927B2 (en) 2020-10-06
EP3325979B1 (fr) 2021-12-08
JP2018520362A (ja) 2018-07-26

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